US7030071B2 - Solid-water detoxifying reagents for chemical and biological agents - Google Patents
Solid-water detoxifying reagents for chemical and biological agents Download PDFInfo
- Publication number
- US7030071B2 US7030071B2 US10/085,512 US8551202A US7030071B2 US 7030071 B2 US7030071 B2 US 7030071B2 US 8551202 A US8551202 A US 8551202A US 7030071 B2 US7030071 B2 US 7030071B2
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- US
- United States
- Prior art keywords
- detoxifying
- hydrophobic
- chemical
- solid
- reagent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
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Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/23—Solid substances, e.g. granules, powders, blocks, tablets
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D3/00—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
- A62D3/30—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
- A62D3/38—Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by oxidation; by combustion
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D2101/00—Harmful chemical substances made harmless, or less harmful, by effecting chemical change
- A62D2101/02—Chemical warfare substances, e.g. cholinesterase inhibitors
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
Definitions
- the present invention relates to detoxifying chemical and biological agents, particularly, to providing detoxifying reagents for chemical and biological agents, and more particularly to the formation of coated solutions of detoxifying reagents using small quantities of treated (hydrophobic) nanoparticles, which results in a dry powder (solid-water), which can be deposited, such as by blowers, on difficult to reach sites for detoxification chemical or biological agents located at such sites.
- aqueous solutions or foams or other decontaminating agents have been used directly on the chemical or biological agent. Since the decontaminating chemicals are delivered everywhere, the chemical reactions associated with detoxification occur throughout the area of application, thereby providing the potential for causing collateral damage to the area surrounding the chemical or biological agents. Thus, there has been a need to provide decontaminating agents whereby depositing thereof at a point of need does not cause collateral damage to the area of application. Also, there is a need to provide remote areas such as ducting or other hard to reach areas with decontaminating chemicals without any cause of collaterial damage thereto.
- a liquid detoxifying reagent is weakly encapsulated with a hydrophobic nanoparticle coaling to produce a powder or “solid-water detoxification reagent” which is “solid” until it contacts the spill of agent, and then the weak, nanoparticle coating breaks down, the detoxifying reagent solution is released and the chemical or biological agent is detoxified.
- This approach is based on the well-known phenomena called “Dry Water”, see Degussa Corporation, Technical Bulletin Pigments No. 23 (1989), “Aerosil as a Thickening Agent for Liquid Systems”, and Degussa Corporation Manuscript “Dry Water—a formulation principle with hydrophobic Aerosil®”.
- a further object of the invention is to provide solid-water detoxification reagents for chemical and biological agents.
- a further object of the invention is to provide solid-water detoxification reagents wherein only contaminated areas see the reactive ingredients, reducing collateral damage to surrounding areas.
- Another object of the invention is to encapsulate solutions of detoxifying reagents using small quantities of treated (hydrophobic) nanoparticles.
- Another object of the invention is to coat detoxifying reagents with hydrophobic nanoparticles by vigorous agitation or by aerosolization of the reagents in the presence of hydrophobic nanoparticles to form a solid powder.
- Another object of the invention is to produce solid-water detoxifying reagents for chemical and biological agents which for example have a 95:5-weight ratio of the detoxifying reagent to the encapsulating hydrophobic nanoparticles.
- Another object of the invention is to provide solid-water detoxifying reagents which can be deposited at a point of use, such as by air blowers, for detoxification of pools of chemical or biological agents without collateral damage to surrounding non-contaminated areas.
- Another object of the invention is to provide solid-water detoxifying reagents that can be deposited in hard-to-reach areas containing chemical or biological agents and which cause no collateral damage to non-contaminated areas.
- the invention involves solid-water detoxifying reagents for chemical and biological agents.
- solutions of detoxifying reagent for chemical and biological agents are coated using small quantities of treated (hydrophobic) nanoparticles by either vigorous agitation or by aerosolization of the solution in the presence of hydrophobic nanoparticles to form a solid powder.
- hydrophobic fumed silica particles see Cabot Corporation Technical Date TSD-131(October 1998), “Cab-O-Sil TS-530 Treated Fumed Silica”
- 1N oxone solution in approximately a 95:5-weight ratio
- the hydrophobic silica forms a porous coating of insoluble fine particles around the solution. Since the chemical or biological agent tends to be hydrophobic, on contact with the weakly encapsulated detoxifying, the porous coating breaks down and the detoxifying reagent is delivered directly to the chemical or biological agent for maximum concentration at the point of need.
- Solutions of detoxifying reagents should be encapsulated by 5% of an appropriately treated colloidal solid, such as hydrophobic fumed silica.
- the “solid-water” detoxifying solutions can be blown into contaminated ventilation ducting or other difficult to reach sites for detoxification of pools of chemical or biological agents.
- Low-pressure air sprayers, blowers, or other techniques can apply the encapsulated detoxifying reagent. Only the contaminated area where the encapsulation breaks down see the reactive ingredients (detoxifying reagent), reducing collateral damage to duck work or other sensitive equipment. The rest of the thus delivered “solid-water” detoxifying reagent can be removed at a low point in the ducting or vacuumed out. Once the agent has been detoxified, it can be removed by flushing the area with air or other techniques.
- the present invention involves solid-water detoxifying reagents for chemical and biological agents.
- a liquid detoxifying reagent is weakly encapsulated with, for example, a 3–7% hydrophobic nanoparticle coating to produce a powder of typically 95% by weight detoxifying solution.
- This “solid-water detoxification reagent” is “solid” until it contacts the spill of a chemical or biological agent, then the weak, nanoparticle coating breaks down, the detoxifying reagent solution is released and the chemical or biological agent is detoxified.
- This approach is based on the well-known phenomena called “Dry Water”, referenced above.
- Residual solid-water detoxifying reagent can be collected at a low point in the structure or vacuumed out. Once the chemical or biological agent has been detoxified, it can be removed by flushing the area with air or by other techniques.
- Solutions of detoxifying reagent can be coated using small quantities of treated (hydrophobic) nanoparticles by vigorous agitation, or by aerosolization of the solution in the presence of the hydrophobic nanoparticle to form a solid powder.
- hydrophobic fumed silica particles are shaken in the presence of 1N oxone solution in approximately a 95:5-weight ratio of solution to particles, a dry powder results.
- Solutions of detoxifying reagents such as hydrogen peroxide, potassium permanganate, sodium hypochloride, ammonium persulfate, or ammonium peroxymono sulfate, should be readily encapsulated by 5% of the appropriately treated colloidal solids, such as hydrophobic fumed silica, alumina, clays and other refractory oxides treated with a hydrophobic chemical.
- a solution of detoxifying reagent is prepared or purchased from a commercial supplier at the appropriate strength and composition to decontaminate a selected chemical or biological agent.
- Several methods of droplet formation are possible for coating the surface of the detoxifying reagent solution with small quantities (4–7%) of hydrophobic nanoparticle.
- the hydrophobic nanoparticle can be added to the solution followed by agitation of the solution, or the solution can be sprayed or dripped into the hydrophobic nanoparticle with agitation.
- Water was successfully encapsulated with three commercial hydrophobic silicas and one developmental product with about 5% hydrophilic silica.
- colloidal nanoparticles such as alumina or clays, could be treated with a hydrophobic chemical to alter their surface characteristics and used to encapsulate detoxifying solutions.
- Aqueous or mixed solvent solutions of detoxifying reagents such as hydrogen peroxide, potassium permanganate, sodium hypochlorite, ammonium persulfate, ammonium peroxymonosulfate, or others can be readily encapsulated with as low as 3–4%, but more typically, 5–7% hydrophobic colloidal solids.
- High concentrations of hydrogen peroxide tended to decompose, generating oxygen, which means that encapsulated hydrogen peroxide would best be prepared just prior to use.
- the other reagent solutions appear to be quite stable.
- the encapsulated reagent solutions tend to loose solvent slowly by evaporation overtime, but can be kept in sealed containers for some period of time, possibly months to years.
- “Dry water” mock of detoxifying reagent can be sprayed into ducting, for example, using low-pressure air or other conventional solid transport equipment, as discussed above. However, this powder will also collapse when it comes in contact with certain organic liquids with an affinity for water. Thus, the detoxifying of chemical and biological agents using the solid-water detoxifying reagents of this invention would be less affective in high moisture areas than in low moisture areas.
- cleanup can be as simple as vacuuming out the solid particles for reuse.
- the chemical or biological agent Once the chemical or biological agent has been detoxified, it can be volatilized away with air or adsorbed on various absorbents and removed.
- the solid-water detoxifying reagents of this invention can be used for detoxification of chemical or biological agents from a terrorist attack, accidental release, or military applications. These reagents are specifically designed to decontaminate ducting, and inaccessible areas of buildings where the chemical or biological agents have been applied and cannot be easily reached by decontamination personnel. These reagents can be used for recovery of contaminated equipment. Simple kits can be prepared for emergency use as required. Large scale detoxification is possible with appropriate equipment. Because of the release of the active reagent only on contact with the desired chemical or biological agent, minimal collateral damage would occur.
- the present invention provides for decontamination of chemical or biological agents which can be delivered to a desired point of use without causing collateral damage to the surrounding area or associated equipment.
- the detoxifying reagent is encapsulated in a material that will release the active reagent, thereof upon contact with a chemical or biological agent, and the solid-water detoxifying reagent can be formulated to an appropriate strength to decontaminate a specific chemical or biological agent.
- the present invention provides a significant advance in the field of detoxification of various materials which can be utilized as undesirable chemical or biological agents.
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Toxicology (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Medicinal Chemistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/085,512 US7030071B2 (en) | 2002-02-26 | 2002-02-26 | Solid-water detoxifying reagents for chemical and biological agents |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US10/085,512 US7030071B2 (en) | 2002-02-26 | 2002-02-26 | Solid-water detoxifying reagents for chemical and biological agents |
Publications (2)
Publication Number | Publication Date |
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US20030160209A1 US20030160209A1 (en) | 2003-08-28 |
US7030071B2 true US7030071B2 (en) | 2006-04-18 |
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Family Applications (1)
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US10/085,512 Expired - Fee Related US7030071B2 (en) | 2002-02-26 | 2002-02-26 | Solid-water detoxifying reagents for chemical and biological agents |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080275288A1 (en) * | 2004-03-05 | 2008-11-06 | Jason Swearingen | Encapsulated Reactant and Process |
US20090061082A1 (en) * | 2004-03-05 | 2009-03-05 | Jason Swearingen | Process for Making Environmental Reactant(s) |
US20100009889A1 (en) * | 2004-04-20 | 2010-01-14 | Smith William L | Dry Delivery Hypochlorite |
US20100119412A1 (en) * | 2008-11-07 | 2010-05-13 | Aries Associates, Inc. | Novel Chemistries, Solutions, and Dispersal Systems for Decontamination of Chemical and Biological Systems |
US20100179368A1 (en) * | 2008-11-07 | 2010-07-15 | Aries Associates, Inc. | Novel Chemistries, Solutions, and Dispersal Systems for Decontamination of Chemical and Biological Systems |
US20110124943A1 (en) * | 2008-06-30 | 2011-05-26 | Cray Valley Sa | Encapsulating composition for the storage of waste that is toxic to health and/or the environment, which is devoid of an aromatic amine hardening agent |
WO2015092678A1 (en) | 2013-12-18 | 2015-06-25 | Fondazione Istituto Italiano Di Tecnologia | Process for encapsulating a liquid |
US10647045B1 (en) | 2016-11-03 | 2020-05-12 | Specialty Earth Sciences, Llc | Shaped or sized encapsulated reactant and method of making |
Families Citing this family (14)
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---|---|---|---|---|
WO2004056955A1 (en) * | 2002-12-20 | 2004-07-08 | Degussa Ag | Liquid detergent and cleaning agent composition |
DE10320197A1 (en) * | 2002-12-20 | 2004-07-08 | Degussa Ag | Enveloped controlled-release peroxygen compounds, process for their preparation and their use |
RU2337134C2 (en) * | 2002-12-20 | 2008-10-27 | Дегусса Аг | Covered peroxide compounds with controlled release, method for their production, and their application |
DE50300760D1 (en) * | 2003-05-07 | 2005-08-18 | Degussa | Enveloped sodium percarbonate granules with improved storage stability |
JP2007509036A (en) * | 2003-05-23 | 2007-04-12 | デグサ アクチエンゲゼルシャフト | Powdery mixture containing hydrogen peroxide and hydrophobized silicon dioxide |
BRPI0410586A (en) * | 2003-05-23 | 2006-06-20 | Degussa | use of powdery mixtures containing hydrogen peroxide and hydrophobized silicon dioxide for the controlled release of hydrogen peroxide or oxygen |
US20090252815A1 (en) * | 2003-05-23 | 2009-10-08 | Evonik Degussa Gmbh | Pulverulent mixtures containing hydrogen peroxide and hydrophobized silicon dioxide |
US20080003171A1 (en) * | 2004-04-20 | 2008-01-03 | Smith William L | Microbial Control Using Hypochlorous Acid Vapor |
US7758807B2 (en) * | 2004-04-20 | 2010-07-20 | The Clorox Company | Microbial control with reduced chlorine |
US7718122B2 (en) * | 2004-04-20 | 2010-05-18 | The Clorox Company | Carriers for hypochlorous acid vapor |
US20050233900A1 (en) * | 2004-04-20 | 2005-10-20 | Smith William L | Dry delivery hypochlorite |
DE102004054495A1 (en) * | 2004-11-11 | 2006-05-24 | Degussa Ag | Sodium percarbonate particles with a thiosulfate containing shell layer |
US20090148342A1 (en) * | 2007-10-29 | 2009-06-11 | Bromberg Steven E | Hypochlorite Technology |
GB0813650D0 (en) * | 2008-07-25 | 2008-09-03 | Ulive Entpr Ltd | Clathrates for gas storage |
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080275288A1 (en) * | 2004-03-05 | 2008-11-06 | Jason Swearingen | Encapsulated Reactant and Process |
US20090061082A1 (en) * | 2004-03-05 | 2009-03-05 | Jason Swearingen | Process for Making Environmental Reactant(s) |
US10335757B2 (en) | 2004-03-05 | 2019-07-02 | Specialty Earth Sciences | Process for making environmental reactant(s) |
US20100009889A1 (en) * | 2004-04-20 | 2010-01-14 | Smith William L | Dry Delivery Hypochlorite |
US20110124943A1 (en) * | 2008-06-30 | 2011-05-26 | Cray Valley Sa | Encapsulating composition for the storage of waste that is toxic to health and/or the environment, which is devoid of an aromatic amine hardening agent |
US8563796B2 (en) * | 2008-06-30 | 2013-10-22 | Ccp Composites | Encapsulating composition for the storage of waste that is toxic to health and/or the environment, which is devoid of an aromatic amine hardening agent |
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WO2015092678A1 (en) | 2013-12-18 | 2015-06-25 | Fondazione Istituto Italiano Di Tecnologia | Process for encapsulating a liquid |
US10188999B2 (en) | 2013-12-18 | 2019-01-29 | Fondazione Istituto Italiano Di Technologia | Process for encapsulating a liquid |
US10647045B1 (en) | 2016-11-03 | 2020-05-12 | Specialty Earth Sciences, Llc | Shaped or sized encapsulated reactant and method of making |
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